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Search for decays of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>mesons into pairs of leptons:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mo>→</mml:mo><mml:mrow><mml:msup><mml:mrow><…
We search for the decay of the B0 meson into a pair of leptons in the suppressed channels B0→e+e−, B0→μ+μ− and in the lepton number violating channel B0→e±μ∓ in a sample of 9.7×106B¯B pairs recorded by CLEO detector. No signal is found, and the following upper limits on the branching …